INA Grupa, headquartered in Zagreb, Croatia, is a prominent oil company with a significant role in the Croatian oil industry and a strong presence in Central and Southeast Europe. Established in 1963, INA has developed into a vertically integrated energy company, engaging in oil and gas exploration, production, refining, and marketing.

The company operates through various segments, including exploration and production primarily in Croatia and Egypt, and refining operations at its refineries in Rijeka and Sisak. INA also manages a network of over 500 service stations, providing fuel and convenience retail services to both consumers and commercial clients. With approximately 9,476 employees, INA is committed to sustainable development and responsible business practices, aiming to contribute positively to the communities it serves.

INA's operations extend beyond Croatia, with subsidiaries in Slovenia, Serbia, Montenegro, Bosnia and Herzegovina, Kosovo, and Italy, making it a key player in the regional energy market.